Well-boring drill.



Y wtf M. T vM@ 2X6@ m@ d y M T MGKEE WELL BORING DRILL.

AHLIUATION HLED MAY 23, 1912.*1111NBW13D 11111.20, 1913,

narran sraras regresa carica.

MIERLEY fr. Maigrir., on BELLE VALLEY, OHIO.

wELnBoRING DitrLL.

Y Application filed May 23, 1912,

To al? whom t may concern Be it known that l, MIERLEY T. MoKEn, a citizen of the United States, residing at Belle Valley, in the county of Noble and 'State of Ohio, have invented certain new and vuseful Improvements in lell-Boring Drills; and 1 do hereby declare the following to be afull., clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

. The present invention relates to drills for boring oil andv similar wells, and has for its purpose to provide a tool for drilling a hole, having means associated therewith for cnlarging the same progressively with the drilling operation; wherein said means is caused to automatically assume its functional position through the drilling operation of the vltool,.and to assume an inoperative position through the withdrawal of said tool.

The invention has for its further purpose a tool of the character in questhe minimum number of parts which are assemrive proto produce tion having of durable construction, bled in the manner b est suited to Sg longed and efficient use.

With these and other objects in view the invention consists in the novel details of -construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claim.

Referring tothe accompanying drawings forming a part of this specification in which like numerals designate like parts in all the views z-Figure 1 is a central, vertical, sectional view of a well casing showing the drill and associated parts in front elevation; Fig. 2 is a front elevational, and partly sectional, view of thedrill and lower end of the casing; Fig. Sis a central, sectional view of the parts shown in Fig. 2, and taken at right angles thereto; and, Fig. i is a transverse sectional view of Fig. 3 taken on the line t-t thereof.

vReferring to the construction in detail, the same consists of a bit 1 constructed `ofv the usual material, and having the opposed faces 2 and 3 thereof downwardly and relatively inclined and terminating with a straight cutting edge 4. r1`he head 5 ofthe bit is provided with an internally screwthreaded collar 6, which is detachably connected with the lower end of the shaft 7, as illustrated/in Figs. 1 and 2.' Said shaft lSpecfwation of Letters Patent. Serial No. 699,340. Renewed January 20, 1913.

4 progressively as the rai-enten. om. ii, isis.

Serial No. 743,204.

7 consists of a plurality of pipe sections suitably coupled together by collars 6, as shown.

The inclined faces 2 and 3 of the bit are each provided with a groove or channel 9 of dove-tailed cross section, and which have slidably mounted therein the dove- Atailed heads 10 of the reaming bits or blocks 11. lllhere are two of said rea-ming bits or blocks 11, c'. e., one slidably mounted on each inclined face (2 or 3), and said members have for their purpose hole vwhich is made by the cutting edge Ll bit 1 works downfor thus enlarging the the following of the casing 13, as will be wardly. The purpose hole is to permit of shoe 12 of the well understood. By reason of the inclined sides 2 and 3, said reaming bits 11 will be caused to work upwardlj)7 as the drilling bit 1 is',

forced downwardly, and for the same reason said bits will slide downwardly, or contract with respect to the bit, thus permitting of the bit 1 being readily withdrawn from the well casing 13.

To permit of inserting and removing the reaming bits 11 from the slots 9, the bit 1 is provided with the lower end of eachof said slots 9. Said blocks or members 14: are of beveled edge construction (see Fig. 2) whereby to have a secure engagement therefor, and as a further fastening means each of the blocks is provided with a pin 15 which passes therethrough and into the body of the bit 1. lVith this construction it will be readily seen reaming bits 11 may be inserted and removed from the slots 9 through the removal of the blocks 14. r1`he bit 1 is provided with a central channel 16 communicating at its upper end with the pipe shaft 7 and at its lower end said channel 16 communicates with a pair of downwardly disposed channels 17. r1`he channels 16 and 17 are adapted to receive from the pipe 7 a flow of water mixed with loam and clay, pipe 7 from above in the usual manner. After issuing through the branch channels 17, said flow is forced upwardly between the bit and well casing -to the surface, as in the ordinary well drilling. A hand turning wheel 18 is mounted on the shaft 7 for the purpose of turning the drilling bit 1.

1t is obvious that those skilled in the art to enlarge thewhich is forced through the a pair of blocks 14 located at their lower ends adjacent may vary the details of construction and arrangement of parts without departing from the spirit of my invention, and therefore I do not Wish to be limited ,to such feay tures except as may be required by the claim. Y

What I claim is In a well boring drill, the combination of a bit having opposed inclined faces, and provided with a straight cutting edge, said inclined faces having formed therein slots of dove-tail cross sectionand terminating at the cutting edgie of the bit; a pair of reaming bits havingintegrallyl formed dovetailed heads slidably mounted in said slots; said pair of reaming bits when at Vthe lower ends of said slots permitting of insertion ,andremoval of the first named bitand the reaming bits through the Well casing; beveled edges secured to the bit adjacentl the lower terminating end ofeach slot permitting of insertion and removal of said reaming bits; and a pipe secured at one end to the head of the bit, said bit having a central channel communicating at one c,end with said pipe and having opposed distributing ports at the' other end thereof, substantially as described.

Initestimony whereof, I affix my ture, in presence of two witnesses.

ivnEieLEYV T. MCKEE.

signa- Witnesses:

S. L. ALTER, L. B. FRAZIER.

'a pair of blocks having 20 

